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                                  Oologah Lake
                          MONTHLY LAKE REPORT
                                 DEC 99


    POOL ELEVATIONS  STORAGE     RELEASES       EVAP  INFLOW   RAINFALL
DAY      FT-NGVD     2400HR         DSF        INCHES   ADJ     INCHES
      0800    2400    AC-FT   POWER    TOTAL  8A TO 8A  DSF    7A TO  7A
                                                               DAM   BSN
PRIOR MONTH  640.27   625822
 1   640.24  640.27   625822      0        0   0.100      50   0.00  0.00
 2   640.25  640.40   630219      0        0   0.140    2300   0.00  0.01
 3   640.32  640.52   634278      0        0   0.030    2300   0.71  0.40
 4   640.86  641.27   659891      0        0   0.050   13000   1.36  1.11
 5   641.58  641.73   675868      0        0   0.000    8100   0.75  0.96

 6   641.83  642.03   686323      0        0   0.030    5350   0.00  0.01
 7   642.06  642.23   693481      0        0   0.050    3750   0.00  0.00
 8   642.22  642.45   701357      0        0   0.090    4000   0.00  0.00
 9   642.53  643.02   721785      0        0   0.010   10400   0.60  0.59
10   643.21  643.42   736573      0     2075   0.000    9000   1.11  0.26

11   643.45  643.53   740642      0     5069   0.050    6350   0.00  0.00
12   643.55  643.55   741380      0     5071   0.000    4300   0.02  0.00
13   643.52  643.24   729918      0     7707   0.000    4300   0.00  0.00
14   643.06  642.90   717466      0    10043   0.030    5100   0.00  0.00
15   642.78  642.57   705653      0    10024   0.120    5100   0.00  0.03

16   642.40  642.42   700282      0     7316   0.090    5000   0.00  0.00
17   642.37  642.54   704578      0     4808   0.100    5150   0.00  0.00
18   642.44  642.40   699568      0     4808   0.080    2200   0.00  0.02
19   642.36  642.28   695272      0     4805   0.000    2200   0.00  0.00
20   642.24  642.09   688471      0     4801   0.040    2200   0.01  0.01

21   642.01  642.04   686679      0     1996   0.070    2200   0.00  0.00
22   642.08  642.14   690260      0      460   0.090    1400   0.00  0.00
23   642.17  642.16   690975      0      461   0.030    1100   0.00  0.00
24   642.26  642.21   692766      0      461   0.050    1000   0.00  0.00
25   642.21  642.21   692766      0      461   0.070    1000   0.00  0.00

26   642.23  642.25   694197      0      461   0.050    1000   0.00  0.00
27   642.27  642.26   694556      0      461   0.000    1000   0.00  0.00
28   642.21  642.27   694914      0      461   0.060    1000   0.00  0.00
29   642.29  642.26   694556      0      461   0.080     900   0.00  0.00
30   642.28  642.35   697776      0      461   0.090     900   0.00  0.00
31   642.35  642.34   697420      0      461   0.100     900   0.00  0.00

TOTAL                             0    73130   1.700  112550   4.56  3.40
AVERAGE   642.24                  0     2359            3631 NORMAL= 1.51

MAXIMUM   643.57      742120   DATE=12    TOP CONSERVATION POOL    638.00
MINIMUM   640.17      622439   DATE= 1    TOP FLOOD POOL           661.00

                      INFLOW VOLUME=   223240 AC-FT



REPORT IS SUBJECT TO CHANGE AND/OR REVISION